/Engine/Source/Editor/BlueprintGraph/Public/BlueprintNodeTemplateCache.h
Wipes any nodes that were cached on behalf of the specified spawner (should be called when NodeSpawner is destroyed, in caseGetNodeTemplate()was called for it).
void ClearCachedTemplate ( [UBlueprintNodeSpawner](API\Editor\BlueprintGraph\UBlueprintNodeSpawner) const * NodeSpawner )